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Finding the Fourth Proportional to 272,043.20, 408,064.80 and 85,073.60

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Solution

The fourth proportional to 272,043.20, 408,064.80 and 85,073.60 is: 127,610.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,043.20 : 408,064.80 = 85,073.60 : x
  2. Step 2: Convert to fraction form
    272,043.20/408,064.80 = 85,073.60/x
  3. Step 3: Cross multiply
    272,043.20x = 408,064.80 × 85,073.60
  4. Step 4: Simplify right side
    272,043.20x = 34,715,541,569.28
  5. Step 5: Solve for x
    x = 34,715,541,569.28/272,043.20
  6. Step 6: Final answer
    x = 127,610.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.